hurdle / hurtle [ˈhɜrdəl]
hurdle – n. & v. – n. – 1. Athletics a series of light forms to be cleared in a race; 2. an obstacle or difficulty; 3. British a portable, temporary fence; v. – 1. intr. run a hurdle race; 2. tr. fence off with hurdles; 3. intr. overcome a difficulty
hurtle – v. intr. – move or hurl rapidly or with a clattering sound